In the Operon concept,the regulator gene functions as:

In $Drosophila$,the set of homeotic genes that control the body plan during organ differentiation is known as.......

Which statement is correct for homeotic genes?

Define an operon,give an example,and explain an inducible operon.

Lac-operon is an example of which one of the following types of regulation of gene expression?

During $DNA$ transcription,$mRNA$ is usually single-stranded. However,sometimes an $RNA$ molecule is produced that is complementary to the $mRNA$. This is called ...... and its function is to ...... .